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Re: [Qemu-devel] QEMU Video Driver for Win NT-based systems

From: Natalia Portillo
Subject: Re: [Qemu-devel] QEMU Video Driver for Win NT-based systems
Date: Thu, 13 May 2004 04:56:20 +0100

Then, why do you require DirectDraw support for activating acceleration?
Is simply.

When no acceleration is, the GDI calls are rendered manually, when it is 
activated, they are rendered through DirectDraw.

On Wed, 12 May 2004 23:52:18 +0200 (CEST)
Grzegorz Kulewski <address@hidden> wrote:

> On Wed, 12 May 2004, Filip Navara wrote:
> > Natalia Portillo wrote:
> > >DirectDraw is the accelerator for GDI.
> >
> > This is not correct. At the driver level GDI calls and DirectDraw calls 
> > are completly separate interfaces implemented different way.
> You are unfortunatelly right. GDI was introduced a lot ealier than 
> DirectX (I think before win95). But GDI can be not accelerated by graphic 
> card but by qemu (using sdl or something like that) because today apps are 
> using GDI mainly for user interface and not for advanced drawing I think. 
> Right?
> Grzegorz Kulewski
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